Kolten Wong is out of the Cardinals' lineup Tuesday due to renewed back tightness.

Wong said his back locked up on him in his final at-bat of Monday's series opener against the Cubs. He's been dealing with this back injury for a while and could be limited the rest of the way. Greg Garcia is starting at second base and batting seventh Tuesday versus Chicago.

It sounds like he could make one final regular-season start Thursday against the White Sox, though nothing is official yet. Heaney has been sidelined since September 10 due to a left shoulder impingement. He returned in late August from Tommy John reconstructive elbow surgery.

Hellickson is scheduled to start Sunday's regular-season finale against the Rays, but it appears that might not happen. The 30-year-old impending free agent is sitting on an 8-11 record, 5.43 ERA, 1.26 WHIP, and 96/47 K/BB ratio through 164 innings this season.

Yadier Molina (concussion) said he's hoping to play again this season, possibly as early as Thursday.

Molina was pulled from Monday's series opener against the Cubs after taking consecutive foul tips off his mask and he vomited as he walked off the field, but he told reporters Tuesday that the nausea has already passed. It'd probably be wise for the Cardinals to simply shut him down, but they have not been mathematically eliminated from the postseason quite yet. Carson Kelly is starting behind the plate for St. Louis on Tuesday versus Chicago.

The nod would have gone to James Shields, but he has been shut down for the year with discomfort in both of his knees. Volstad holds a 1.08 ERA and 0.84 WHIP over 8 1/3 innings of relief this season with Chicago, but the 31-year-old right-hander is not a recommended fantasy streaming option because he probably won't last very long in the game.